12007657 has 4 divisors (see below), whose sum is σ = 12028500. Its totient is φ = 11986816.

The previous prime is 12007651. The next prime is 12007663. The reversal of 12007657 is 75670021.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12007651) and next prime (12007663).

It can be written as a sum of positive squares in 2 ways, for example, as 5433561 + 6574096 = 2331^2 + 2564^2 .

It is a cyclic number.

It is not a de Polignac number, because 12007657 - 2³ = 12007649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12007651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9532 + ... + 10717.

It is an arithmetic number, because the mean of its divisors is an integer number (3007125).

Almost surely, 2^12007657 is an apocalyptic number.

It is an amenable number.

12007657 is a deficient number, since it is larger than the sum of its proper divisors (20843).

12007657 is an equidigital number, since it uses as much as digits as its factorization.

12007657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20842.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 12007657 is about 3465.2066316455. The cubic root of 12007657 is about 228.9915330292.

Adding to 12007657 its reverse (75670021), we get a palindrome (87677678).

The spelling of 12007657 in words is "twelve million, seven thousand, six hundred fifty-seven".